CN108117668A - The fire retardant of one kind structure containing melamine, preparation method and applications - Google Patents

The fire retardant of one kind structure containing melamine, preparation method and applications Download PDF

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CN108117668A
CN108117668A CN201810035973.7A CN201810035973A CN108117668A CN 108117668 A CN108117668 A CN 108117668A CN 201810035973 A CN201810035973 A CN 201810035973A CN 108117668 A CN108117668 A CN 108117668A
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compound
fire retardant
melamine
retardant
containing melamine
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CN108117668B (en
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王龙
刘娜
李德江
刘明国
黄年玉
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China Three Gorges University CTGU
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00Use of organic ingredients
    • C08K5/16Nitrogen-containing compounds
    • C08K5/34Heterocyclic compounds having nitrogen in the ring
    • C08K5/3467Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
    • C08K5/3477Six-membered rings
    • C08K5/3492Triazines
    • C08K5/34922Melamine; Derivatives thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/03Catalysts comprising molecular sieves not having base-exchange properties
    • B01J29/0308Mesoporous materials not having base exchange properties, e.g. Si-MCM-41
    • B01J29/0316Mesoporous materials not having base exchange properties, e.g. Si-MCM-41 containing iron group metals, noble metals or copper
    • B01J29/0333Iron group metals or copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/0215Sulfur-containing compounds
    • B01J31/0225Sulfur-containing compounds comprising sulfonic acid groups or the corresponding salts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1616Coordination complexes, e.g. organometallic complexes, immobilised on an inorganic support, e.g. ship-in-a-bottle type catalysts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/1691Coordination polymers, e.g. metal-organic frameworks [MOF]
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/19Catalysts containing parts with different compositions
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D251/00Heterocyclic compounds containing 1,3,5-triazine rings
    • C07D251/02Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
    • C07D251/12Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D251/26Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
    • C07D251/40Nitrogen atoms
    • C07D251/54Three nitrogen atoms
    • C07D251/70Other substituted melamines

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Fireproofing Substances (AREA)

Abstract

The present invention relates to the fire retardant of one kind structure containing melamine, preparation method and applications, chemical structural formula is:Wherein, substituent R1、R2And R3For any one in hydrogen, tertiary butyl, normal-butyl, cyclohexylalkyl or chloride, bromine, methyl, methoxyl group, nitro, amino, hydroxyl substituted aryl or heteroaryl.Synthetic method is that the Ugi occurred under the concerted catalysis of the copper complex, MIL 101 and the p-methyl benzenesulfonic acid that are loaded with carboxylic acid compound and melamine, aldehyde compound and different nitrile compounds in MCM 41 at 50 DEG C in the in the mixed solvent of methanol and isopropanol reacts, and product must contain the fire retardant of melamine by filtering, extraction and column chromatography.The invention describes that a kind of reaction is simple, by-product is few, the preferable novel preparation method of selectivity is used for selectively production of melamine based flame retardant.The fire retardant thermostabilization of the present invention is good, and fire-retardant rate is high, and up to 97.2%, used raw material is easy to get purity, technique is advanced, is easy to industrialized production.

Description

The fire retardant of one kind structure containing melamine, preparation method and applications
Technical field
The present invention relates to the fire retardant of one kind structure containing melamine, preparation method and applications researchs.
Background technology
There are secondary hazards such as thickness, the releasings of toxic or corrosive gas when traditional halogen fire proofing burns, to people Body constitutes safely serious threat, therefore finds new halogen-free flame retardants and be particularly important.Melamine based flame retardant because With Halogen low toxicity;Decomposition temperature is high, is suitble to processing;Mechanical performance is influenced small;It does not ooze out, does not corrode mold;Flame retardant property The characteristics such as excellent, the new and effective fire retardant of the structure containing melamine have very big Development volue, cause people widely studied. In Britain, the ground such as Europe and North America, melamine analog derivative be used to improve polyurethane foamed plastics flame retardant property, and oneself expands It opens up in other kinds of polymer, such as hard poly- cruel foamed plastics of ammonia, thermoplastic.The application test model of nearest melamine It encloses and is expanded to nylon and the fields such as pvc pipe.Melamine can be as the reason for excellent flame retardant three when 250~450 Poly cyanamid absorbs heat, reaction of decomposing, and releases ammonia, forms condensation polymer;The melting behavior of basis material is influenced, and accelerates its charcoal Chemical conversion is burnt.But the fire retardant of the structure containing melamine is applied at present and development is relatively slow, has put into the product commercially produced It is few, low yield, price high the shortcomings of complicated there are synthesis technology.
Patent of the present invention introduces three kinds of copper complex of MCM-41 loads, MIL-101 and p-methyl benzenesulfonic acid catalyst, passes through The mechanism of three kinds of catalyst concerted catalysis, catalysis carboxylic acid compound and melamine, aldehyde compound and isonitrile class chemical combination The Ugi reactions that four component of object participates in, one pot of colleges and universities are prepared for the fire retardant of the structure containing melamine of a series of new.
The content of the invention
It is a primary object of the present invention to provide the fire retardant of a kind of structure containing melamine, preparation method and applications are ground Study carefully.
Technical scheme is as follows:
The fire retardant of one kind structure containing melamine, the compound chemical structure formula are:
Wherein, substituent R1、R2And R3For the alkyl such as hydrogen, tertiary butyl, normal-butyl, cyclohexyl or chloride, bromine, methyl, methoxy Any one in the substituted aryls such as base, nitro, amino, hydroxyl or heteroaryl, substituting group position, number and conjugate position are not It is fixed.
Further preferably described reaction equation is:
Further preferably described reaction equation is:
Further preferably described reaction equation is:
The synthesis method, the described method includes following synthesis paths:
It the described method comprises the following steps:
(1) under nitrogen protection, compound 1, compound 2, compound 3, compound 4, first are sequentially added into reactor The mixed solvent of alcohol and isopropanol, being stirred 30 minutes at 45-60 DEG C makes its dissolving;
(2) copper complex, MIL-101 and the p-methyl benzenesulfonic acid that catalyst MCM-41 loads are sequentially added after dissolving continue to stir It mixes, while temperature is reduced to 20-40 DEG C, the reaction was continued 20-28h after the completion of TLC detection reactions, removes solvent methanol under reduced pressure And ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target compound I, completes the preparation of melamine based flame retardant. Compound 1 in the step (1), compound 2, compound 3, the molar ratio of compound 4 is 2-5:0.1-2:1-4: 1-4. Further preferably middle compound 1, compound 2, compound 3, the molar ratio of compound 4 is 3.3:1:3: 3.15.
Compound 1 in the step (1), copper complex, MIL-101 and the p-methyl benzenesulfonic acid that catalyst MCM-41 is loaded The mass ratio that feeds intake is 1:0.05-1:0.05-1:0.05-1.
The solution temperature of the step (1) is 50 DEG C;The reaction temperature of step (2) is 40 DEG C.
Step (1) solvent is methanol and the mixed solvent of isopropanol, and the volume ratio of methanol and isopropanol is 2:1.
Catalyst described in the step (2) is the copper complex of MCM-41 loads, MIL-101 and p-methyl benzenesulfonic acid Mixed catalyst.
The fire retardant of the structure containing melamine described in any one adds in epoxy resin, polyurethane cooperative flame retardant Add the application in agent.
The present invention has the beneficial effect that:
1st, present invention firstly discloses three kinds of the copper complexes, MIL-101 and p-methyl benzenesulfonic acid loaded with a kind of MCM-41 The strategy that catalyst collaboration is urged prepares a series of syntheti c route of melamine based flame retardants.This method is easy to operate, by-product It is few, there is higher use value.
2nd, the present invention is prepared for the fire retardant of a new class of structure containing melamine, provides that a kind of manufacturing cost is low, behaviour Make simple and high reaction efficiency novel preparation method.
3rd, the present invention is prepared for the fire retardant of a new class of structure containing melamine, which has thermostabilization Well, the advantages that fire-retardant rate is high.The new flame retardant is the important supplement of melamine based flame retardant, at the same epoxy resin, There are higher potentiality and wide application value on polyurethane cooperative flame retardant additive.
Specific embodiment
It is further illustrated the present invention with reference to embodiment, but the scope of protection of present invention is not limited to implement The scope of example statement.
Instrument and reagent:
SHZ-E type circulating water types vacuum pump (the biochemical instrument plants of Shanghai Rong Ya);DZE-6120 type vacuum drying chambers (Shanghai Heng Tian scientific instrument manufacturing company);WRS-1A numeral melting point instruments (Shanghai Suoguang Optoelectronic Technology Co., Ltd.);EB2005A electronics Balance;ZF-I type ultraviolet analysis instrument for three purposed;DE-102J heat collecting types constant-temperature heating magnetic stirring apparatus (Gongyi City's grey hair chemical apparatuses Factory);DFX-5L/30 cryogenic thermostats reactive bath technique (hundred river instrument plant of Wuxi City);(Linhai City is forever for 2YZ-4A type rotary vane types vacuum oil pump Vast and boundless vacuum equipment factory).Formic acid (AR), p-methyl benzenesulfonic acid (AR), formaldehyde (AR), tert-butyl isonitrile (AR), acetic acid (AR), benzoic acid (AR), methanol (AR), isopropanol (AR), ethyl acetate (AR), industrial nitrogen (AR).
Specific embodiment
It is further illustrated the present invention with reference to embodiment, but the scope of protection of present invention is not limited to implement The scope of example statement.
Instrument and reagent:
Fusing point is measured with X4 types melting point apparatus (production of the 3rd optical instrument factory of Beijing), and thermometer is not calibrated;1H NMR and13C NMR 600 type 600MHz cores of 400 type 400MHz Nuclear Magnetic Resonance of Varian Mercury or Varian Mercury Magnetic resonance device measures, deuterochloroform (CDCl3) or deuterated dimethyl sulfoxide (DMSO-d6) it is solvent, TMS is internal standard;MS is used FinniganTrace mass spectrographs measure;Elemental analysis is measured using Vario EL III elemental analysers;Agents useful for same is domestic (or import) chemistry is pure or analysis is pure.Solvent methanol and isopropanol are dried.
Embodiment 1
It is a kind of to prepare N- (tert-butyl) -2- (N- (4,6-diamino-1,3,5-triazin-2-yl) Formamido) the method for acetamide fire retardants, including following experimental procedure:
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), tert-butyl isonitrile 4a (0.091g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), being heated to 50 DEG C of stirrings makes its molten in 30 minutes Solution.Copper complex (0.025g), the MIL-101 (0.025g) and to toluene sulphur of catalyst MCM-41 loads are sequentially added after dissolving Sour (0.017g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, under reduced pressure Solvent methanol and ethyl alcohol are removed, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 57.01%.
Yield:57.01%
Elemental analysis:45.31 H% of measured value C%, 6.02 N% 37.79
44.94 H% of calculated value C%, 6.41 N% 36.68
1H NMR(CDCl3,400MHz)δ(ppm)8.31-8.03(s,1H,CO-H),7.13-5.19(m,6H,CH,NH, 2NH2),1.51-1.13(s,9H,3CH3).
HRMS Calculatedfor[C10H17N7O2+H]+:268.1522,Found:268.1461.
Embodiment 2
It is a kind of to prepare octyl 2- (2- (N- (4,6-diamino-1,3,5-triazin-2-yl) formamido) Acetamido) the method for acetate fire retardants, including following experimental procedure:
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), acetic acid n-octyl isonitrile 4b (0.22 g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), being heated to 50 DEG C of stirrings makes its dissolving in 30 minutes. Copper complex (0.025g), MIL-101 (0.025g) and the p-methyl benzenesulfonic acid of catalyst MCM-41 loads are sequentially added after dissolving (0.017g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, removes under reduced pressure Remove solvent methanol and ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 41.30%.
Yield:41.30%
Embodiment 3
It is a kind of to prepare octyl 2- (2- (N- (4,6-diamino-1,3,5-triazin-2-yl) -4- Nitrobenzamido) acetamido) acetate fire retardants method, including following experimental procedure:
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.) is sequentially added into reactor, it is right Nitrobenzoic acid 2b (0.167g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), acetic acid is just pungent Ester isonitrile 4b (0.22g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), be heated to 50 DEG C of stirrings makes for 30 minutes It is dissolved.Copper complex (0.025g), the MIL-101 (0.025g) and to first of catalyst MCM-41 loads are sequentially added after dissolving Benzene sulfonic acid (0.017g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, is subtracting Pressure removes solvent methanol and ethyl alcohol, and residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 33.97%.
Yield:33.97%
Embodiment 4
It is a kind of to prepare N- (tert-butyl) -2- (N- (4,6-diamino-1,3,5-triazin-2-yl) Formamido) the method for acetamide fire retardants, including following experimental procedure:
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), tert-butyl isonitrile 4a (0.091g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), being heated to 50 DEG C of stirrings makes its dissolving in 30 minutes. Copper complex (0.050g), MIL-101 (0.050g) and the p-methyl benzenesulfonic acid of catalyst MCM-41 loads are sequentially added after dissolving (0.034g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, removes under reduced pressure Remove solvent methanol and ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 51.36%.
Embodiment 5
It is a kind of to prepare N- (tert-butyl) -2- (N- (4,6-diamino-1,3,5-triazin-2-yl) Formamido) the method for acetamide fire retardants, including following experimental procedure:
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), tert-butyl isonitrile 4a (0.091g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), being heated to 50 DEG C of stirrings makes its molten in 30 minutes Solution.Copper complex (0.0125g), the MIL-101 (0.0125g) and to toluene of catalyst MCM-41 loads are sequentially added after dissolving Sulfonic acid (0.008g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, is depressurizing Lower removing solvent methanol and ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 49.53%.
Embodiment 6
Under nitrogen protection, compound melamine 1 (3.78g), formic acid 2a (0.46g), first are sequentially added into reactor Aldehyde 3a (0.30g), tert-butyl isonitrile 4a (0.91g), MeOH:I-PrOH=2:1 (100ml) is heated to 50 DEG C and stirs 30 minutes Make its dissolving.Copper complex (0.25g), the MIL-101 (0.25g) and to first of catalyst MCM-41 loads are sequentially added after dissolving Benzene sulfonic acid (0.17g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, is depressurizing Lower removing solvent methanol and ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 49.70%.
Yield:49.70%.
Embodiment 7
Under nitrogen protection, compound melamine 1 (0.0378g), formic acid 2a are sequentially added into reactor (0.0046g), formaldehyde 3a (0.0030g), tert-butyl isonitrile 4a (0.0091g), MeOH:I-PrOH=2:1 (1ml), is heated to 50 DEG C of stirrings make its dissolving in 30 minutes.Sequentially added after dissolving catalyst MCM-41 load copper complex (0.0025g), MIL-101 (0.0025 g) and p-methyl benzenesulfonic acid (0.0017g) continue to stir, while temperature is reduced to 40 DEG C, and the reaction was continued for 24 hours Afterwards, after the completion of TLC detections reaction, solvent methanol and ethyl alcohol are removed under reduced pressure, and residue is filtered, extraction and column chromatography, obtains To target fire retardant Ia, yield 52.58%.
Yield:52.58%.
Embodiment 8
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), tert-butyl isonitrile 4a (0.091g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (5ml), being heated to 50 DEG C of stirrings makes its dissolving in 30 minutes. Copper complex (0.025g), MIL-101 (0.025g) and the p-methyl benzenesulfonic acid of catalyst MCM-41 loads are sequentially added after dissolving (0.017g) continues to stir, while temperature is reduced to 40 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, removes under reduced pressure Remove solvent methanol and ethyl alcohol, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 53.29%.
Yield:53.29%.
Embodiment 9
Under nitrogen protection, compound melamine 1 (0.378g, 3mmol, 3.0eqv.), first are sequentially added into reactor Sour 2a (0.046g, 1.0mmol, 1.0eqv.), formaldehyde 3a (0.030g, 1.0mmol, 1.0eqv.), tert-butyl isonitrile 4a (0.091g, 1.1mmol, 1.1eqv.), MeOH:I-PrOH=2:1 (10ml), being heated to 50 DEG C of stirrings makes its molten in 30 minutes Solution.Copper complex (0.025g), the MIL-101 (0.025g) and to toluene sulphur of catalyst MCM-41 loads are sequentially added after dissolving Sour (0.017g) continues to stir, while temperature is reduced to 25 DEG C, after the reaction was continued for 24 hours, after the completion of TLC detection reactions, under reduced pressure Solvent methanol and ethyl alcohol are removed, residue is filtered, extraction and column chromatography, obtains target fire retardant Ia, yield 57.01%.
Yield:39.22%.
The new flame retardant of the structure provided by the invention containing melamine is as epoxy resin, polyurethane flame-proof additive Using as follows:Batten is made according to insulating laminated sheet combustibility testing standard, is carried out respectively with JF-3 types oxygen index measurer Limit oxygen index (LOI) is tested, and FZ-5401 types Vertical combustion instrument carries out the test of UL94 vertical combustions performance, and measurement result is as follows Shown in Tables 1 and 2.
Table 1:1 fire retardant of the embodiment of the present invention is to the flame retardant effect of polyurethane
Table 2:1 fire retardant of the embodiment of the present invention is to the flame retardant effect of epoxy resin
The new flame retardant thermostabilization of the structure containing melamine of the present invention is good, and fire-retardant rate is high.The new flame retardant is three The important supplement of poly cyanamid based flame retardant, while have higher potentiality on epoxy resin, polyurethane cooperative flame retardant additive With wide application value.The research of the fire retardant of the new structure containing melamine is necessary and very urgent.This hair Bright patent provides the novel preparation method that a kind of manufacturing cost is low, easy to operate, selectivity is good and reaction efficiency is high.

Claims (10)

1. the fire retardant of a kind of structure containing melamine, which is characterized in that the reaction equation is:
Wherein, substituent R1、R2And R3For hydrogen, tertiary butyl, normal-butyl, the alkyl of cyclohexyl or chloride, bromine, methyl, methoxyl group, Nitro, amino, hydroxyl substituted aryl or heteroaryl in any one, substituting group position, number and conjugate position be not solid Determine or including more than fire retardant composite fire retardant as main component.
2. the fire retardant of the structure described in claim 1 containing melamine, which is characterized in that the reaction equation is:
3. the fire retardant of the structure described in claim 1 containing melamine, which is characterized in that the reaction equation is:
4. the fire retardant of the structure described in claim 1 containing melamine, which is characterized in that the reaction equation is:
5. synthesize the method for claim 1-4 any one of them melamine class compounds, which is characterized in that the method bag Include following synthesis path:
It the described method comprises the following steps:
(1) under nitrogen protection, sequentially add compound 1 into reactor, compound 2, compound 3, compound 4, methanol with The mixed solvent of isopropanol, being stirred 30 minutes at 45-60 DEG C makes its dissolving;
(2) copper complex, MIL-101 and the p-methyl benzenesulfonic acid that catalyst MCM-41 loads are sequentially added after dissolving continue to stir, Temperature is reduced to 30-40 DEG C simultaneously, the reaction was continued 20-28h, after the completion of TLC detection reactions, removes solvent methanol and second under reduced pressure Alcohol, residue is filtered, extraction and column chromatography, obtains target compound I, completes the preparation of melamine based flame retardant.
6. according to the method described in claim 2, it is characterized in that:Compound 1 in the step (1), compound 2, compound 3, the molar ratio of compound 4 is 0.1-2:2-5:1-4:1-4.
7. according to the method described in claim 2, it is characterized in that:Compound 1 in the step (1), catalyst MCM-41 are born The copper complex of load, the mass ratio that feeds intake of MIL-101 and p-methyl benzenesulfonic acid is 1:0.05-1:0.05-1:0.05-1.
8. according to the method described in claim 2, it is characterized in that:The solution temperature of the step (1) is 50 DEG C;Step (2) Reaction temperature be 40 DEG C.
9. according to the method described in claim 2, it is characterized in that:Step (1) solvent is the mixing of methanol and isopropanol Solvent, and the volume ratio of methanol and isopropanol is 2:1.
10. the fire retardant of the structure containing melamine being prepared described in any one described in claim 5-9 is in epoxy Application on resin, polyurethane cooperative flame retardant additive.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110423225A (en) * 2019-06-28 2019-11-08 中北大学 A kind of preparation method and applications containing melamine compound

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